bool LevellerDataset::make_local_coordsys(const char* pszName, const char* pszUnits)
{
OGRSpatialReference sr;
sr.SetLocalCS(pszName);
double d;
return ( this->convert_measure(1.0, d, pszUnits)
&& OGRERR_NONE == sr.SetLinearUnits(pszUnits, d)
&& OGRERR_NONE == sr.exportToWkt(&m_pszProjection) );
}
GDALDataset *BTDataset::Open( GDALOpenInfo * poOpenInfo )
{
/* -------------------------------------------------------------------- */
/* Verify that this is some form of binterr file. */
/* -------------------------------------------------------------------- */
if( poOpenInfo->nHeaderBytes < 256)
return NULL;
if( !STARTS_WITH((const char *) poOpenInfo->pabyHeader, "binterr") )
return NULL;
/* -------------------------------------------------------------------- */
/* Create the dataset. */
/* -------------------------------------------------------------------- */
BTDataset *poDS = new BTDataset();
memcpy( poDS->abyHeader, poOpenInfo->pabyHeader, 256 );
/* -------------------------------------------------------------------- */
/* Get the version. */
/* -------------------------------------------------------------------- */
char szVersion[4] = {};
strncpy( szVersion, (char *) (poDS->abyHeader + 7), 3 );
szVersion[3] = '\0';
poDS->nVersionCode = static_cast<int>(CPLAtof(szVersion) * 10);
/* -------------------------------------------------------------------- */
/* Extract core header information, being careful about the */
/* version. */
/* -------------------------------------------------------------------- */
GInt32 nIntTemp = 0;
memcpy( &nIntTemp, poDS->abyHeader + 10, 4 );
poDS->nRasterXSize = CPL_LSBWORD32( nIntTemp );
memcpy( &nIntTemp, poDS->abyHeader + 14, 4 );
poDS->nRasterYSize = CPL_LSBWORD32( nIntTemp );
if( !GDALCheckDatasetDimensions(poDS->nRasterXSize, poDS->nRasterYSize) )
{
delete poDS;
return NULL;
}
GInt16 nDataSize = 0;
memcpy( &nDataSize, poDS->abyHeader+18, 2 );
nDataSize = CPL_LSBWORD16( nDataSize );
GDALDataType eType = GDT_Unknown;
if( poDS->abyHeader[20] != 0 && nDataSize == 4 )
eType = GDT_Float32;
else if( poDS->abyHeader[20] == 0 && nDataSize == 4 )
eType = GDT_Int32;
else if( poDS->abyHeader[20] == 0 && nDataSize == 2 )
eType = GDT_Int16;
else
{
CPLError( CE_Failure, CPLE_AppDefined,
".bt file data type unknown, got datasize=%d.",
nDataSize );
delete poDS;
return NULL;
}
/*
rcg, apr 7/06: read offset 62 for vert. units.
If zero, assume 1.0 as per spec.
*/
memcpy( &poDS->m_fVscale, poDS->abyHeader + 62, 4 );
CPL_LSBPTR32(&poDS->m_fVscale);
if(poDS->m_fVscale == 0.0f)
poDS->m_fVscale = 1.0f;
/* -------------------------------------------------------------------- */
/* Try to read a .prj file if it is indicated. */
/* -------------------------------------------------------------------- */
OGRSpatialReference oSRS;
if( poDS->nVersionCode >= 12 && poDS->abyHeader[60] != 0 )
{
const char *pszPrjFile = CPLResetExtension( poOpenInfo->pszFilename,
"prj" );
VSILFILE *fp = VSIFOpenL( pszPrjFile, "rt" );
if( fp != NULL )
{
const int nBufMax = 10000;
char *pszBuffer = static_cast<char *>(CPLMalloc(nBufMax));
const int nBytes =
static_cast<int>(VSIFReadL( pszBuffer, 1, nBufMax-1, fp ));
CPL_IGNORE_RET_VAL(VSIFCloseL( fp ));
pszBuffer[nBytes] = '\0';
char *pszBufPtr = pszBuffer;
if( oSRS.importFromWkt( &pszBufPtr ) != OGRERR_NONE )
{
CPLError( CE_Warning, CPLE_AppDefined,
"Unable to parse .prj file, "
"coordinate system missing." );
}
CPLFree( pszBuffer );
}
}
/* -------------------------------------------------------------------- */
/* If we didn't find a .prj file, try to use internal info. */
/* -------------------------------------------------------------------- */
if( oSRS.GetRoot() == NULL )
{
GInt16 nUTMZone = 0;
memcpy( &nUTMZone, poDS->abyHeader + 24, 2 );
nUTMZone = CPL_LSBWORD16( nUTMZone );
GInt16 nDatum = 0;
memcpy( &nDatum, poDS->abyHeader + 26, 2 );
nDatum = CPL_LSBWORD16( nDatum );
GInt16 nHUnits = 0;
memcpy( &nHUnits, poDS->abyHeader + 22, 2 );
nHUnits = CPL_LSBWORD16( nHUnits );
if( nUTMZone != 0 )
oSRS.SetUTM( std::abs(static_cast<int>(nUTMZone)), nUTMZone > 0 );
else if( nHUnits != 0 )
oSRS.SetLocalCS( "Unknown" );
if( nHUnits == 1 )
oSRS.SetLinearUnits( SRS_UL_METER, 1.0 );
else if( nHUnits == 2 )
oSRS.SetLinearUnits( SRS_UL_FOOT, CPLAtof(SRS_UL_FOOT_CONV) );
else if( nHUnits == 3 )
oSRS.SetLinearUnits( SRS_UL_US_FOOT, CPLAtof(SRS_UL_US_FOOT_CONV) );
// Translate some of the more obvious old USGS datum codes
if( nDatum == 0 )
nDatum = 6201;
else if( nDatum == 1 )
nDatum = 6209;
else if( nDatum == 2 )
nDatum = 6210;
else if( nDatum == 3 )
nDatum = 6202;
else if( nDatum == 4 )
nDatum = 6203;
else if( nDatum == 6 )
nDatum = 6222;
else if( nDatum == 7 )
nDatum = 6230;
else if( nDatum == 13 )
nDatum = 6267;
else if( nDatum == 14 )
nDatum = 6269;
else if( nDatum == 17 )
nDatum = 6277;
else if( nDatum == 19 )
nDatum = 6284;
else if( nDatum == 21 )
nDatum = 6301;
else if( nDatum == 22 )
nDatum = 6322;
else if( nDatum == 23 )
nDatum = 6326;
if( !oSRS.IsLocal() )
{
if( nDatum >= 6000 )
{
char szName[32];
snprintf( szName, sizeof(szName), "EPSG:%d", nDatum-2000 );
oSRS.SetWellKnownGeogCS( szName );
}
else
oSRS.SetWellKnownGeogCS( "WGS84" );
}
}
/* -------------------------------------------------------------------- */
/* Convert coordinate system back to WKT. */
/* -------------------------------------------------------------------- */
if( oSRS.GetRoot() != NULL )
oSRS.exportToWkt( &poDS->pszProjection );
/* -------------------------------------------------------------------- */
/* Get georeferencing bounds. */
/* -------------------------------------------------------------------- */
if( poDS->nVersionCode >= 11 )
{
double dfLeft = 0.0;
memcpy( &dfLeft, poDS->abyHeader + 28, 8 );
CPL_LSBPTR64( &dfLeft );
double dfRight = 0.0;
memcpy( &dfRight, poDS->abyHeader + 36, 8 );
CPL_LSBPTR64( &dfRight );
double dfBottom = 0.0;
memcpy( &dfBottom, poDS->abyHeader + 44, 8 );
CPL_LSBPTR64( &dfBottom );
double dfTop = 0.0;
memcpy( &dfTop, poDS->abyHeader + 52, 8 );
CPL_LSBPTR64( &dfTop );
poDS->adfGeoTransform[0] = dfLeft;
poDS->adfGeoTransform[1] = (dfRight - dfLeft) / poDS->nRasterXSize;
poDS->adfGeoTransform[2] = 0.0;
poDS->adfGeoTransform[3] = dfTop;
poDS->adfGeoTransform[4] = 0.0;
poDS->adfGeoTransform[5] = (dfBottom - dfTop) / poDS->nRasterYSize;
poDS->bGeoTransformValid = TRUE;
}
/* -------------------------------------------------------------------- */
/* Re-open the file with the desired access. */
/* -------------------------------------------------------------------- */
if( poOpenInfo->eAccess == GA_Update )
poDS->fpImage = VSIFOpenL( poOpenInfo->pszFilename, "rb+" );
else
poDS->fpImage = VSIFOpenL( poOpenInfo->pszFilename, "rb" );
if( poDS->fpImage == NULL )
{
CPLError( CE_Failure, CPLE_OpenFailed,
"Failed to re-open %s within BT driver.\n",
poOpenInfo->pszFilename );
delete poDS;
return NULL;
}
poDS->eAccess = poOpenInfo->eAccess;
/* -------------------------------------------------------------------- */
/* Create band information objects */
/* -------------------------------------------------------------------- */
poDS->SetBand( 1, new BTRasterBand( poDS, poDS->fpImage, eType ) );
#ifdef notdef
poDS->bGeoTransformValid =
GDALReadWorldFile( poOpenInfo->pszFilename, ".wld",
poDS->adfGeoTransform );
#endif
/* -------------------------------------------------------------------- */
/* Initialize any PAM information. */
/* -------------------------------------------------------------------- */
poDS->SetDescription( poOpenInfo->pszFilename );
poDS->TryLoadXML();
/* -------------------------------------------------------------------- */
/* Check for overviews. */
/* -------------------------------------------------------------------- */
poDS->oOvManager.Initialize( poDS, poOpenInfo->pszFilename );
return poDS;
}
GDALDataset *FASTDataset::Open( GDALOpenInfo * poOpenInfo )
{
if( poOpenInfo->nHeaderBytes < 1024)
return NULL;
if( !EQUALN((const char *) poOpenInfo->pabyHeader + 52,
"ACQUISITION DATE =", 18)
&& !EQUALN((const char *) poOpenInfo->pabyHeader + 36,
"ACQUISITION DATE =", 18) )
return NULL;
/* -------------------------------------------------------------------- */
/* Create a corresponding GDALDataset. */
/* -------------------------------------------------------------------- */
FASTDataset *poDS = new FASTDataset();
poDS->fpHeader = VSIFOpenL(poOpenInfo->pszFilename, "rb");
if (poDS->fpHeader == NULL)
{
delete poDS;
return NULL;
}
poDS->pszFilename = poOpenInfo->pszFilename;
poDS->pszDirname = CPLStrdup( CPLGetDirname( poOpenInfo->pszFilename ) );
/* -------------------------------------------------------------------- */
/* Read the administrative record. */
/* -------------------------------------------------------------------- */
char *pszHeader =
static_cast<char *>( CPLMalloc( ADM_HEADER_SIZE + 1 ) );
size_t nBytesRead = 0;
if( VSIFSeekL( poDS->fpHeader, 0, SEEK_SET ) >= 0 )
nBytesRead = VSIFReadL( pszHeader, 1, ADM_HEADER_SIZE, poDS->fpHeader );
if ( nBytesRead < ADM_MIN_HEADER_SIZE )
{
CPLDebug( "FAST", "Header file too short. Reading failed" );
CPLFree(pszHeader);
delete poDS;
return NULL;
}
pszHeader[nBytesRead] = '\0';
// Read acquisition date
char *pszTemp = GetValue( pszHeader, ACQUISITION_DATE,
ACQUISITION_DATE_SIZE, TRUE );
if (pszTemp == NULL)
{
CPLDebug( "FAST", "Cannot get ACQUISITION_DATE, using empty value." );
pszTemp = CPLStrdup("");
}
poDS->SetMetadataItem( "ACQUISITION_DATE", pszTemp );
CPLFree( pszTemp );
// Read satellite name (will read the first one only)
pszTemp = GetValue( pszHeader, SATELLITE_NAME, SATELLITE_NAME_SIZE, TRUE );
if (pszTemp == NULL)
{
CPLDebug( "FAST", "Cannot get SATELLITE_NAME, using empty value." );
pszTemp = CPLStrdup( "" );
}
poDS->SetMetadataItem( "SATELLITE", pszTemp );
if ( STARTS_WITH_CI(pszTemp, "LANDSAT") )
poDS->iSatellite = LANDSAT;
// TODO(schwehr): Was this a bug that both are IRS?
// else if ( STARTS_WITH_CI(pszTemp, "IRS") )
// poDS->iSatellite = IRS;
else
poDS->iSatellite = IRS; // TODO(schwehr): Should this be FAST_UNKNOWN?
CPLFree( pszTemp );
// Read sensor name (will read the first one only)
pszTemp = GetValue( pszHeader, SENSOR_NAME, SENSOR_NAME_SIZE, TRUE );
if (pszTemp == NULL)
{
CPLDebug( "FAST", "Cannot get SENSOR_NAME, using empty value." );
pszTemp = CPLStrdup("");
}
poDS->SetMetadataItem( "SENSOR", pszTemp );
CPLFree( pszTemp );
// Read filenames
poDS->nBands = 0;
if (strstr( pszHeader, FILENAME ) == NULL)
{
if (strstr(pszHeader, "GENERATING AGENCY =EUROMAP"))
{
// If we don't find the FILENAME field, let's try with the Euromap
// PAN / LISS3 / WIFS IRS filename convention.
if ((EQUAL(poDS->GetMetadataItem("SATELLITE"), "IRS 1C") ||
EQUAL(poDS->GetMetadataItem("SATELLITE"), "IRS 1D")) &&
(EQUAL(poDS->GetMetadataItem("SENSOR"), "PAN") ||
EQUAL(poDS->GetMetadataItem("SENSOR"), "LISS3") ||
EQUAL(poDS->GetMetadataItem("SENSOR"), "WIFS")))
{
poDS->TryEuromap_IRS_1C_1D_ChannelNameConvention();
}
else if (EQUAL(poDS->GetMetadataItem("SATELLITE"), "CARTOSAT-1") &&
(EQUAL(poDS->GetMetadataItem("SENSOR"), "FORE") ||
EQUAL(poDS->GetMetadataItem("SENSOR"), "AFT")))
{
// See appendix F in
// http://www.euromap.de/download/p5fast_20050301.pdf
const CPLString osSuffix = CPLGetExtension( poDS->pszFilename );
const char *papszBasenames[] =
{ "BANDF", "bandf", "BANDA", "banda" };
for ( int i = 0; i < 4; i++ )
{
const CPLString osChannelFilename =
CPLFormFilename( poDS->pszDirname, papszBasenames[i],
osSuffix );
if( poDS->OpenChannel( osChannelFilename, 0 ) )
{
poDS->nBands = 1;
break;
}
}
}
else if( EQUAL(poDS->GetMetadataItem("SATELLITE"), "IRS P6") )
{
// If BANDS_PRESENT="2345", the file bands are "BAND2.DAT",
// "BAND3.DAT", etc.
pszTemp =
GetValue( pszHeader, BANDS_PRESENT, BANDS_PRESENT_SIZE,
TRUE );
if (pszTemp)
{
for( int i=0; pszTemp[i] != '\0'; i++ )
{
if( pszTemp[i] >= '2' && pszTemp[i] <= '5' )
{
if( poDS->FOpenChannel(
poDS->pszFilename,
poDS->nBands, pszTemp[i] - '0'))
poDS->nBands++;
}
}
CPLFree( pszTemp );
}
}
}
}
// If the previous lookup for band files didn't success, fallback to the
// standard way of finding them, either by the FILENAME field, either with
// the usual patterns like bandX.dat, etc.
if( !poDS->nBands )
{
pszTemp = pszHeader;
for ( int i = 0; i < 7; i++ )
{
char *pszFilename = NULL ;
if ( pszTemp )
pszTemp = strstr( pszTemp, FILENAME );
if ( pszTemp )
{
// Skip the parameter name
pszTemp += strlen(FILENAME);
// Skip whitespaces and equal signs
while ( *pszTemp == ' ' )
pszTemp++;
while ( *pszTemp == '=' )
pszTemp++;
pszFilename =
CPLScanString( pszTemp, FILENAME_SIZE, TRUE, FALSE );
}
else
pszTemp = NULL;
if ( poDS->FOpenChannel( pszFilename, poDS->nBands,
poDS->nBands + 1 ) )
poDS->nBands++;
if ( pszFilename )
CPLFree( pszFilename );
}
}
if ( !poDS->nBands )
{
CPLError( CE_Failure, CPLE_NotSupported,
"Failed to find and open band data files." );
CPLFree(pszHeader);
delete poDS;
return NULL;
}
// Read number of pixels/lines and bit depth
pszTemp = GetValue( pszHeader, PIXELS, PIXELS_SIZE, FALSE );
if ( pszTemp )
{
poDS->nRasterXSize = atoi( pszTemp );
CPLFree( pszTemp );
}
else
{
CPLDebug( "FAST", "Failed to find number of pixels in line." );
CPLFree(pszHeader);
delete poDS;
return NULL;
}
pszTemp = GetValue( pszHeader, LINES1, LINES_SIZE, FALSE );
if ( !pszTemp )
pszTemp = GetValue( pszHeader, LINES2, LINES_SIZE, FALSE );
if ( pszTemp )
{
poDS->nRasterYSize = atoi( pszTemp );
CPLFree( pszTemp );
}
else
{
CPLDebug( "FAST", "Failed to find number of lines in raster." );
CPLFree(pszHeader);
delete poDS;
return NULL;
}
if (!GDALCheckDatasetDimensions(poDS->nRasterXSize, poDS->nRasterYSize))
{
CPLFree(pszHeader);
delete poDS;
return NULL;
}
pszTemp = GetValue( pszHeader, BITS_PER_PIXEL, BITS_PER_PIXEL_SIZE, FALSE );
if ( pszTemp )
{
switch( atoi(pszTemp) )
{
case 8:
default:
poDS->eDataType = GDT_Byte;
break;
// For a strange reason, some Euromap products declare 10 bits
// output, but are 16 bits.
case 10:
case 16:
poDS->eDataType = GDT_UInt16;
break;
}
CPLFree( pszTemp );
}
else
{
poDS->eDataType = GDT_Byte;
}
/* -------------------------------------------------------------------- */
/* Read radiometric record. */
/* -------------------------------------------------------------------- */
const char *pszFirst = NULL;
const char *pszSecond = NULL;
// Read gains and biases. This is a trick!
pszTemp = strstr( pszHeader, "BIASES" );// It may be "BIASES AND GAINS"
// or "GAINS AND BIASES"
const char* pszGains = strstr( pszHeader, "GAINS" );
if( pszTemp == NULL || pszGains == NULL )
{
CPLDebug( "FAST", "No BIASES and/or GAINS" );
CPLFree( pszHeader );
delete poDS;
return NULL;
}
if ( pszTemp > pszGains )
{
pszFirst = "GAIN%d";
pszSecond = "BIAS%d";
}
else
{
pszFirst = "BIAS%d";
pszSecond = "GAIN%d";
}
// Now search for the first number occurrence after that string.
for ( int i = 1; i <= poDS->nBands; i++ )
{
char *pszValue = NULL;
size_t nValueLen = VALUE_SIZE;
pszTemp = strpbrk( pszTemp, "-.0123456789" );
if ( pszTemp )
{
nValueLen = strspn( pszTemp, "+-.0123456789" );
pszValue =
CPLScanString( pszTemp, static_cast<int>(nValueLen),
TRUE, TRUE );
poDS->SetMetadataItem( CPLSPrintf(pszFirst, i ), pszValue );
CPLFree( pszValue );
}
pszTemp += nValueLen;
pszTemp = strpbrk( pszTemp, "-.0123456789" );
if ( pszTemp )
{
nValueLen = strspn( pszTemp, "+-.0123456789" );
pszValue =
CPLScanString( pszTemp, static_cast<int>(nValueLen),
TRUE, TRUE );
poDS->SetMetadataItem( CPLSPrintf(pszSecond, i ), pszValue );
CPLFree( pszValue );
}
pszTemp += nValueLen;
}
/* -------------------------------------------------------------------- */
/* Read geometric record. */
/* -------------------------------------------------------------------- */
// Coordinates of pixel's centers
double dfULX = 0.0;
double dfULY = 0.0;
double dfURX = 0.0;
double dfURY = 0.0;
double dfLLX = 0.0;
double dfLLY = 0.0;
double dfLRX = 0.0;
double dfLRY = 0.0;
// Read projection name
pszTemp = GetValue( pszHeader, PROJECTION_NAME,
PROJECTION_NAME_SIZE, FALSE );
long iProjSys = 0;
if ( pszTemp && !EQUAL( pszTemp, "" ) )
iProjSys = USGSMnemonicToCode( pszTemp );
else
iProjSys = 1L; // UTM by default
CPLFree( pszTemp );
// Read ellipsoid name
pszTemp = GetValue( pszHeader, ELLIPSOID_NAME, ELLIPSOID_NAME_SIZE, FALSE );
long iDatum = 0; // Clarke, 1866 (NAD1927) by default.
if ( pszTemp && !EQUAL( pszTemp, "" ) )
iDatum = USGSEllipsoidToCode( pszTemp );
CPLFree( pszTemp );
// Read zone number.
pszTemp = GetValue( pszHeader, ZONE_NUMBER, ZONE_NUMBER_SIZE, FALSE );
long iZone = 0;
if ( pszTemp && !EQUAL( pszTemp, "" ) )
iZone = atoi( pszTemp );
CPLFree( pszTemp );
// Read 15 USGS projection parameters
double adfProjParms[15] = { 0.0 };
pszTemp = strstr( pszHeader, USGS_PARAMETERS );
if ( pszTemp && !EQUAL( pszTemp, "" ) )
{
pszTemp += strlen( USGS_PARAMETERS );
for ( int i = 0; i < 15; i++ )
{
pszTemp = strpbrk( pszTemp, "-.0123456789" );
if ( pszTemp )
adfProjParms[i] = CPLScanDouble( pszTemp, VALUE_SIZE );
pszTemp = strpbrk( pszTemp, " \t" );
}
}
// Coordinates should follow the word "PROJECTION", otherwise we can
// be confused by other occurrences of the corner keywords.
char *pszGeomRecord = strstr( pszHeader, "PROJECTION" );
// Read corner coordinates
pszTemp = strstr( pszGeomRecord, CORNER_UPPER_LEFT );
if ( pszTemp && !EQUAL( pszTemp, "" ) )
{
pszTemp += strlen( CORNER_UPPER_LEFT ) + 28;
dfULX = CPLScanDouble( pszTemp, CORNER_VALUE_SIZE );
pszTemp += CORNER_VALUE_SIZE + 1;
dfULY = CPLScanDouble( pszTemp, CORNER_VALUE_SIZE );
}
pszTemp = strstr( pszGeomRecord, CORNER_UPPER_RIGHT );
if ( pszTemp && !EQUAL( pszTemp, "" ) )
{
pszTemp += strlen( CORNER_UPPER_RIGHT ) + 28;
dfURX = CPLScanDouble( pszTemp, CORNER_VALUE_SIZE );
pszTemp += CORNER_VALUE_SIZE + 1;
dfURY = CPLScanDouble( pszTemp, CORNER_VALUE_SIZE );
}
pszTemp = strstr( pszGeomRecord, CORNER_LOWER_LEFT );
if ( pszTemp && !EQUAL( pszTemp, "" ) )
{
pszTemp += strlen( CORNER_LOWER_LEFT ) + 28;
dfLLX = CPLScanDouble( pszTemp, CORNER_VALUE_SIZE );
pszTemp += CORNER_VALUE_SIZE + 1;
dfLLY = CPLScanDouble( pszTemp, CORNER_VALUE_SIZE );
}
pszTemp = strstr( pszGeomRecord, CORNER_LOWER_RIGHT );
if ( pszTemp && !EQUAL( pszTemp, "" ) )
{
pszTemp += strlen( CORNER_LOWER_RIGHT ) + 28;
dfLRX = CPLScanDouble( pszTemp, CORNER_VALUE_SIZE );
pszTemp += CORNER_VALUE_SIZE + 1;
dfLRY = CPLScanDouble( pszTemp, CORNER_VALUE_SIZE );
}
if ( dfULX != 0.0 && dfULY != 0.0
&& dfURX != 0.0 && dfURY != 0.0
&& dfLLX != 0.0 && dfLLY != 0.0
&& dfLRX != 0.0 && dfLRY != 0.0 )
{
// Strip out zone number from the easting values, if either
if ( dfULX >= 1000000.0 )
dfULX -= static_cast<double>( iZone ) * 1000000.0;
if ( dfURX >= 1000000.0 )
dfURX -= static_cast<double>( iZone ) * 1000000.0;
if ( dfLLX >= 1000000.0 )
dfLLX -= static_cast<double>( iZone ) * 1000000.0;
if ( dfLRX >= 1000000.0 )
dfLRX -= static_cast<double>( iZone ) * 1000000.0;
// In EOSAT FAST Rev C, the angles are in decimal degrees
// otherwise they are in packed DMS format.
const int bAnglesInPackedDMSFormat =
strstr( pszHeader, "REV C" ) == NULL;
// Create projection definition
OGRSpatialReference oSRS;
OGRErr eErr =
oSRS.importFromUSGS( iProjSys, iZone, adfProjParms, iDatum, bAnglesInPackedDMSFormat );
if ( eErr != OGRERR_NONE )
CPLDebug( "FAST", "Import projection from USGS failed: %d", eErr );
oSRS.SetLinearUnits( SRS_UL_METER, 1.0 );
// Read datum name
pszTemp = GetValue( pszHeader, DATUM_NAME, DATUM_NAME_SIZE, FALSE );
if ( pszTemp )
{
if ( EQUAL( pszTemp, "WGS84" ) )
oSRS.SetWellKnownGeogCS( "WGS84" );
else if ( EQUAL( pszTemp, "NAD27" ) )
oSRS.SetWellKnownGeogCS( "NAD27" );
else if ( EQUAL( pszTemp, "NAD83" ) )
oSRS.SetWellKnownGeogCS( "NAD83" );
CPLFree( pszTemp );
}
else
{
// Reasonable fallback
oSRS.SetWellKnownGeogCS( "WGS84" );
}
if ( poDS->pszProjection )
CPLFree( poDS->pszProjection );
eErr = oSRS.exportToWkt( &poDS->pszProjection );
if ( eErr != OGRERR_NONE )
CPLDebug("FAST", "Export projection to WKT USGS failed: %d", eErr);
// Generate GCPs
GDAL_GCP *pasGCPList
= static_cast<GDAL_GCP *>( CPLCalloc( sizeof( GDAL_GCP ), 4 ) );
GDALInitGCPs( 4, pasGCPList );
CPLFree(pasGCPList[0].pszId);
CPLFree(pasGCPList[1].pszId);
CPLFree(pasGCPList[2].pszId);
CPLFree(pasGCPList[3].pszId);
/* Let's order the GCP in TL, TR, BR, BL order to benefit from the */
/* GDALGCPsToGeoTransform optimization */
pasGCPList[0].pszId = CPLStrdup("UPPER_LEFT");
pasGCPList[0].dfGCPX = dfULX;
pasGCPList[0].dfGCPY = dfULY;
pasGCPList[0].dfGCPZ = 0.0;
pasGCPList[0].dfGCPPixel = 0.5;
pasGCPList[0].dfGCPLine = 0.5;
pasGCPList[1].pszId = CPLStrdup("UPPER_RIGHT");
pasGCPList[1].dfGCPX = dfURX;
pasGCPList[1].dfGCPY = dfURY;
pasGCPList[1].dfGCPZ = 0.0;
pasGCPList[1].dfGCPPixel = poDS->nRasterXSize-0.5;
pasGCPList[1].dfGCPLine = 0.5;
pasGCPList[2].pszId = CPLStrdup("LOWER_RIGHT");
pasGCPList[2].dfGCPX = dfLRX;
pasGCPList[2].dfGCPY = dfLRY;
pasGCPList[2].dfGCPZ = 0.0;
pasGCPList[2].dfGCPPixel = poDS->nRasterXSize-0.5;
pasGCPList[2].dfGCPLine = poDS->nRasterYSize-0.5;
pasGCPList[3].pszId = CPLStrdup("LOWER_LEFT");
pasGCPList[3].dfGCPX = dfLLX;
pasGCPList[3].dfGCPY = dfLLY;
pasGCPList[3].dfGCPZ = 0.0;
pasGCPList[3].dfGCPPixel = 0.5;
pasGCPList[3].dfGCPLine = poDS->nRasterYSize-0.5;
// Calculate transformation matrix, if accurate
const bool transform_ok
= CPL_TO_BOOL(
GDALGCPsToGeoTransform( 4, pasGCPList,
poDS->adfGeoTransform, 0 ) );
if( !transform_ok )
{
poDS->adfGeoTransform[0] = 0.0;
poDS->adfGeoTransform[1] = 1.0;
poDS->adfGeoTransform[2] = 0.0;
poDS->adfGeoTransform[3] = 0.0;
poDS->adfGeoTransform[4] = 0.0;
poDS->adfGeoTransform[5] = 1.0;
if ( poDS->pszProjection )
CPLFree( poDS->pszProjection );
poDS->pszProjection = CPLStrdup("");
}
GDALDeinitGCPs(4, pasGCPList);
CPLFree(pasGCPList);
}
/* -------------------------------------------------------------------- */
/* Create band information objects. */
/* -------------------------------------------------------------------- */
const int nPixelOffset = GDALGetDataTypeSize(poDS->eDataType) / 8;
const int nLineOffset = poDS->nRasterXSize * nPixelOffset;
for( int i = 1; i <= poDS->nBands; i++ )
{
poDS->SetBand( i, new FASTRasterBand( poDS, i, poDS->fpChannels[i - 1],
0, nPixelOffset, nLineOffset, poDS->eDataType, TRUE));
}
CPLFree( pszHeader );
/* -------------------------------------------------------------------- */
/* Initialize any PAM information. */
/* -------------------------------------------------------------------- */
poDS->SetDescription( poOpenInfo->pszFilename );
poDS->TryLoadXML();
// opens overviews.
poDS->oOvManager.Initialize(poDS, poDS->pszFilename);
/* -------------------------------------------------------------------- */
/* Confirm the requested access is supported. */
/* -------------------------------------------------------------------- */
if( poOpenInfo->eAccess == GA_Update )
{
delete poDS;
CPLError( CE_Failure, CPLE_NotSupported,
"The FAST driver does not support update access to existing"
" datasets." );
return NULL;
}
return poDS;
}
int TerragenDataset::LoadFromFile()
{
GUInt16 nSize, xpts=0, ypts=0;
m_dSCAL = 30.0;
m_nDataOffset = 0;
if(0 != VSIFSeekL(m_fp, 16, SEEK_SET))
return 0;
char szTag[4];
if(!this->read_next_tag(szTag) || !tag_is(szTag, "SIZE"))
return 0;
if(!this->get(nSize) || !this->skip(2))
return 0;
// Set dimensions to SIZE chunk. If we don't
// encounter XPTS/YPTS chunks, we can assume
// the terrain to be square.
xpts = ypts = nSize+1;
while(this->read_next_tag(szTag))
{
if(this->tag_is(szTag, "XPTS"))
{
this->get(xpts);
if(xpts < nSize || !this->skip(2))
return 0;
continue;
}
if(this->tag_is(szTag, "YPTS"))
{
this->get(ypts);
if(ypts < nSize || !this->skip(2))
return 0;
continue;
}
if(this->tag_is(szTag, "SCAL"))
{
float sc[3];
this->get(sc[0]);
this->get(sc[1]);
this->get(sc[2]);
m_dSCAL = sc[1];
continue;
}
if(this->tag_is(szTag, "CRAD"))
{
if(!this->skip(sizeof(float)))
return 0;
continue;
}
if(this->tag_is(szTag, "CRVM"))
{
if(!this->skip(sizeof(GUInt32)))
return 0;
continue;
}
if(this->tag_is(szTag, "ALTW"))
{
this->get(m_nHeightScale);
this->get(m_nBaseHeight);
m_nDataOffset = VSIFTellL(m_fp);
if(!this->skip(xpts * ypts * sizeof(GInt16)))
return 0;
continue;
}
if(this->tag_is(szTag, "EOF "))
{
break;
}
}
if(xpts == 0 || ypts == 0 || m_nDataOffset == 0)
return 0;
nRasterXSize = xpts;
nRasterYSize = ypts;
// todo: sanity check: do we have enough pixels?
// Cache realworld scaling and offset.
m_dScale = m_dSCAL / 65536 * m_nHeightScale;
m_dOffset = m_dSCAL * m_nBaseHeight;
strcpy(m_szUnits, "m");
// Make our projection to have origin at the
// NW corner, and groundscale to match elev scale
// (i.e., uniform voxels).
m_adfTransform[0] = 0.0;
m_adfTransform[1] = m_dSCAL;
m_adfTransform[2] = 0.0;
m_adfTransform[3] = 0.0;
m_adfTransform[4] = 0.0;
m_adfTransform[5] = m_dSCAL;
/* -------------------------------------------------------------------- */
/* Set projection. */
/* -------------------------------------------------------------------- */
// Terragen files as of Apr 2006 are partially georeferenced,
// we can declare a local coordsys that uses meters.
OGRSpatialReference sr;
sr.SetLocalCS("Terragen world space");
if(OGRERR_NONE != sr.SetLinearUnits("m", 1.0))
return 0;
if(OGRERR_NONE != sr.exportToWkt(&m_pszProjection))
return 0;
return TRUE;
}
rspfString rspfOgcWktTranslator::fromOssimKwl(const rspfKeywordlist &kwl,
const char *prefix)const
{
rspfString projType = kwl.find(rspfKeywordNames::TYPE_KW);
rspfString datumType = kwl.find(rspfKeywordNames::DATUM_KW);
rspfString wktString;
OGRSpatialReference oSRS;
if(projType == "")
{
return wktString;
}
rspfString zone = kwl.find(prefix, rspfKeywordNames::ZONE_KW);
rspfString hemisphere = kwl.find(prefix, rspfKeywordNames::HEMISPHERE_KW);
rspfString parallel1 = kwl.find(prefix, rspfKeywordNames::STD_PARALLEL_1_KW);
rspfString parallel2 = kwl.find(prefix, rspfKeywordNames::STD_PARALLEL_2_KW);
rspfString originLat = kwl.find(prefix, rspfKeywordNames::ORIGIN_LATITUDE_KW);
rspfString centralMeridian = kwl.find(prefix, rspfKeywordNames::CENTRAL_MERIDIAN_KW);
rspfString scale = kwl.find(prefix, rspfKeywordNames::SCALE_FACTOR_KW);
rspfString pcsCode = kwl.find(prefix, rspfKeywordNames::PCS_CODE_KW);
rspfDpt falseEastingNorthing;
falseEastingNorthing.x = 0.0;
falseEastingNorthing.y = 0.0;
const char *lookup =
kwl.find(prefix, rspfKeywordNames::FALSE_EASTING_NORTHING_UNITS_KW);
if (lookup)
{
rspfUnitType units =
static_cast<rspfUnitType>(rspfUnitTypeLut::instance()->
getEntryNumber(lookup));
lookup = kwl.find(prefix, rspfKeywordNames::FALSE_EASTING_NORTHING_KW);
if (lookup)
{
rspfDpt eastingNorthing;
eastingNorthing.toPoint(std::string(lookup));
switch (units)
{
case RSPF_METERS:
{
falseEastingNorthing = eastingNorthing;
break;
}
case RSPF_FEET:
case RSPF_US_SURVEY_FEET:
{
rspfUnitConversionTool ut;
ut.setValue(eastingNorthing.x, units);
falseEastingNorthing.x = ut.getValue(RSPF_METERS);
ut.setValue(eastingNorthing.y, units);
falseEastingNorthing.y = ut.getValue(RSPF_METERS);
break;
}
default:
{
rspfNotify(rspfNotifyLevel_WARN)
<< "rspfOgcWktTranslator::fromOssimKwl WARNING!"
<< "Unhandled unit type for "
<< rspfKeywordNames::FALSE_EASTING_NORTHING_UNITS_KW
<< ": "
<< ( rspfUnitTypeLut::instance()->
getEntryString(units).c_str() )
<< endl;
break;
}
} // End of switch (units)
} // End of if (FALSE_EASTING_NORTHING_KW)
} // End of if (FALSE_EASTING_NORTHING_UNITS_KW)
else
{
lookup = kwl.find(prefix, rspfKeywordNames::FALSE_EASTING_KW);
if(lookup)
{
falseEastingNorthing.x = fabs(rspfString(lookup).toFloat64());
}
lookup = kwl.find(prefix, rspfKeywordNames::FALSE_NORTHING_KW);
if(lookup)
{
falseEastingNorthing.y = fabs(rspfString(lookup).toFloat64());
}
}
oSRS.SetLinearUnits("Meter", 1.0);
int pcsCodeVal = (pcsCode.empty() == false) ? pcsCode.toInt() : EPSG_CODE_MAX;
if(pcsCodeVal < EPSG_CODE_MAX)
{
rspfEpsgProjectionDatabase* proj_db = rspfEpsgProjectionDatabase::instance();
rspfString pcsCodeName = proj_db->findProjectionName(pcsCodeVal);
if ( pcsCodeName.contains("HARN") && pcsCodeName.contains("_Feet") )
{
rspfString feetStr("_Feet");
rspfString newPcsCodeName( pcsCodeName.before(feetStr).c_str() );
rspfString epsg_spec = proj_db->findProjectionCode(newPcsCodeName);
rspf_uint32 new_code = epsg_spec.after(":").toUInt32();
if (new_code)
pcsCodeVal = new_code;
}
oSRS.importFromEPSG( pcsCodeVal );
}
else if(projType == "rspfUtmProjection")
{
#if 0
hemisphere = hemisphere.trim().upcase();
if(hemisphere != "")
{
oSRS.SetUTM(zone.toLong(), hemisphere != "S");
}
else
{
oSRS.SetUTM(zone.toLong(), true);
}
#else
short gcs = USER_DEFINED;
if (datumType == "WGE") gcs = GCS_WGS_84;
else if (datumType == "WGD") gcs = GCS_WGS_72;
else if (datumType == "NAR-C") gcs = GCS_NAD83;
else if (datumType == "NAR") gcs = GCS_NAD83;
else if (datumType == "NAS-C") gcs = GCS_NAD27;
else if (datumType == "NAS") gcs = GCS_NAD27;
else if (datumType == "ADI-M") gcs = GCS_Adindan;
else if (datumType == "ARF-M") gcs = GCS_Arc_1950;
else if (datumType == "ARS-M") gcs = GCS_Arc_1960;
else if (datumType == "EUR-7" || datumType == "EUR-M") gcs = GCS_ED50;
else if ((datumType == "OGB-7") ||
(datumType == "OGB-M") ||
(datumType == "OGB-A") ||
(datumType == "OGB-B") ||
(datumType == "OGB-C") ||
(datumType == "OGB-D")) gcs = GCS_OSGB_1936;
else if (datumType == "TOY-M") gcs = GCS_Tokyo;
else
{
if(traceDebug())
{
rspfNotify(rspfNotifyLevel_DEBUG)
<< "DATUM = " << datumType << " tag not written " << std::endl
<< "Please let us know so we can add it" << std::endl;
}
}
int mapZone = zone.toInt();
hemisphere = hemisphere.trim().upcase();
bool bDoImportFromEPSG = false;
switch ( gcs )
{
case GCS_WGS_84:
{
if (hemisphere == "N") // Northern hemisphere.
{
pcsCodeVal = 32600 + mapZone;
}
else // Southern hemisphere.
{
pcsCodeVal = 32700 + mapZone;
}
bDoImportFromEPSG = true;
break;
}
case GCS_WGS_72:
{
if (hemisphere == "N") // Northern hemisphere.
{
pcsCodeVal = 32200 + mapZone;
}
else // Southern hemisphere.
{
pcsCodeVal = 32300 + mapZone;
}
bDoImportFromEPSG = true;
break;
}
case GCS_NAD27:
{
if (hemisphere == "N") // Northern hemisphere.
{
pcsCodeVal = 26700 + mapZone;
}
else // Southern hemisphere.
{
pcsCodeVal = 32000 + mapZone;
}
bDoImportFromEPSG = true;
break;
}
case GCS_NAD83:
{
if (hemisphere == "N") // Northern hemisphere.
{
pcsCodeVal = 26900 + mapZone;
}
else // Southern hemisphere.
{
pcsCodeVal = 32100 + mapZone;
}
bDoImportFromEPSG = true;
break;
}
default:
{
if (mapZone > 0) // Northern hemisphere.
{
pcsCodeVal = 16000 + mapZone;
}
else if (mapZone < 0) // Southern hemisphere.
{
hemisphere = "S";
pcsCodeVal = 16100 + abs(mapZone);
}
break;
}
} // End of "switch ( gcs )"
if ( bDoImportFromEPSG == true )
oSRS.importFromEPSG( pcsCodeVal );
else
{
if(hemisphere != "")
{
oSRS.SetUTM(zone.toLong(), hemisphere != "S");
}
else
{
oSRS.SetUTM(zone.toLong(), true);
}
}
#endif
}
else if(projType == "rspfLlxyProjection")
{
OGRSpatialReference oGeogCS;
oGeogCS.SetEquirectangular(0.0,
0.0,
0.0,
0.0);
oGeogCS.SetAngularUnits(SRS_UA_DEGREE, atof(SRS_UA_DEGREE_CONV));
oSRS.CopyGeogCSFrom( &oGeogCS );
}
else if(projType == "rspfEquDistCylProjection")
{
OGRSpatialReference oGeogCS;
oGeogCS.SetEquirectangular(originLat.toDouble(),
centralMeridian.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
oGeogCS.SetAngularUnits(SRS_UA_DEGREE, atof(SRS_UA_DEGREE_CONV));
oSRS.CopyGeogCSFrom( &oGeogCS );
}
else if(projType == "rspfSinusoidalProjection")
{
oSRS.SetSinusoidal(centralMeridian.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else if(projType == "rspfCylEquAreaProjection")
{
oSRS.SetCEA(originLat.toDouble(),
centralMeridian.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else if(projType == "rspfCassiniProjection")
{
oSRS.SetCS(originLat.toDouble(),
centralMeridian.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else if(projType == "rspfAlbersProjection")
{
oSRS.SetACEA(parallel1.toDouble(),
parallel2.toDouble(),
originLat.toDouble(),
centralMeridian.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else if(projType == "rspfAzimEquDistProjection")
{
oSRS.SetAE(originLat.toDouble(),
centralMeridian.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else if(projType == "rspfEckert4Projection")
{
oSRS.SetEckertIV(centralMeridian.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else if(projType == "rspfEckert6Projection")
{
oSRS.SetEckertVI(centralMeridian.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else if(projType == "rspfGnomonicProjection")
{
oSRS.SetGnomonic(originLat.toDouble(),
centralMeridian.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else if(projType == "rspfLambertConformalConicProjection")
{
oSRS.SetLCC(parallel1.toDouble(),
parallel2.toDouble(),
originLat.toDouble(),
centralMeridian.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else if(projType == "rspfVanDerGrintenProjection")
{
oSRS.SetVDG(centralMeridian.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else if(projType == "rspfMillerProjection")
{
oSRS.SetMC(originLat.toDouble(),
centralMeridian.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else if(projType == "rspfMercatorProjection")
{
oSRS.SetMercator(originLat.toDouble(),
centralMeridian.toDouble(),
scale.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else if(projType == "rspfMollweidProjection")
{
oSRS.SetMollweide(centralMeridian.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else if(projType == "rspfNewZealandMapGridProjection")
{
oSRS.SetNZMG(originLat.toDouble(),
centralMeridian.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else if(projType == "rspfOrthoGraphicProjection")
{
oSRS.SetOrthographic(originLat.toDouble(),
centralMeridian.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else if(projType == "rspfPolarStereoProjection")
{
oSRS.SetPS(originLat.toDouble(),
centralMeridian.toDouble(),
scale.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else if(projType == "rspfPolyconicProjectio")
{
oSRS.SetPolyconic(originLat.toDouble(),
centralMeridian.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else if(projType == "rspfStereographicProjection")
{
oSRS.SetStereographic(originLat.toDouble(),
centralMeridian.toDouble(),
scale.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else if(projType == "rspfTransMercatorProjection")
{
oSRS.SetTM(originLat.toDouble(),
centralMeridian.toDouble(),
scale.toDouble(),
falseEastingNorthing.x,
falseEastingNorthing.y);
}
else
{
cerr << "rspfOgcWktTranslator::fromOssimKwl:\n"
<< "Projection translation for "
<< projType
<< " not supported "
<< endl;
}
if(pcsCodeVal >= EPSG_CODE_MAX)
{
datumType = datumType.upcase();
if(datumType == "WGE")
{
oSRS.SetWellKnownGeogCS("WGS84");
}
else if(datumType == "WGD")
{
oSRS.SetWellKnownGeogCS("WGS72");
}
else if(datumType == "NAS-C") //1927
{
oSRS.SetWellKnownGeogCS("NAD27");
}
else if(datumType == "NAS") //1927
{
oSRS.SetWellKnownGeogCS("NAD27");
}
else if(datumType == "NAR-C") // 1983
{
oSRS.SetWellKnownGeogCS("NAD83");
}
else if(datumType == "NAR") // 1983
{
oSRS.SetWellKnownGeogCS("NAD83");
}
else if(datumType == "NTF")
{
oSRS.SetWellKnownGeogCS("EPSG:4275");
}
else
{
cerr << "rspfOgcWktTranslator::fromOssimKwl: Datum translation for "
<< datumType
<<" not supported"
<< endl;
}
}
char* exportString = NULL;
oSRS.exportToWkt(&exportString);
if(exportString)
{
wktString = exportString;
OGRFree(exportString);
}
return wktString;
}